hash Namespace Reference

Usage: std::string msg = "The quick brown fox jumps over the lazy dog"; std::string key = "key"; std::string md5hmac = hmac< MD5 >(msg, key); std::string sha1hmac = hmac< SHA1 >(msg, key); std::string sha2hmac = hmac<SHA256>(msg, key);. More...

Classes
class	CRC32
	compute CRC32 hash, based on Intel's Slicing-by-8 algorithm More...
class	Hash
	abstract base class More...
class	Keccak
	compute Keccak hash (designated SHA3) More...
class	MD5
	compute MD5 hash More...
class	SHA1
	compute SHA1 hash More...
class	SHA256
	compute SHA256 hash More...
class	SHA3
	compute SHA3 hash More...

Functions
template<typename HashMethod>
std::string	hmac (const void *data, size_t numDataBytes, const void *key, size_t numKeyBytes)
	compute HMAC hash of data and key using MD5, SHA1 or SHA256
template<typename HashMethod>
std::string	hmac (const std::string &data, const std::string &key)
	convenience function for std::string

Detailed Description

Usage: std::string msg = "The quick brown fox jumps over the lazy dog"; std::string key = "key"; std::string md5hmac = hmac< MD5 >(msg, key); std::string sha1hmac = hmac< SHA1 >(msg, key); std::string sha2hmac = hmac<SHA256>(msg, key);.

Note: To keep my code simple, HMAC computation currently needs the whole message at once. This is in contrast to the hashes MD5, SHA1, etc. where an add() method is available for incremental computation. You can use any hash for HMAC as long as it provides:

• constant HashMethod::BlockSize (typically 64)
• constant HashMethod::HashBytes (length of hash in bytes, e.g. 20 for SHA1)
• HashMethod::add(buffer, bufferSize)
• HashMethod::getHash(unsigned char buffer[HashMethod::BlockSize])

Function Documentation

hmac() [1/2]

template<typename HashMethod>

std::string hash::hmac	(	const std::string &	data,
		const std::string &	key )

convenience function for std::string

Definition at line 88 of file hmac.h.

References hmac().

hmac() [2/2]

template<typename HashMethod>

std::string hash::hmac	(	const void *	data,
		size_t	numDataBytes,
		const void *	key,
		size_t	numKeyBytes )

compute HMAC hash of data and key using MD5, SHA1 or SHA256

Definition at line 43 of file hmac.h.

Referenced by hmac().